It looks like they're reintroducing retail at the corner of Rusk and Main:
SA and Elmore Sports Group in discussions for a new ballpark in Downtown SA for a relocated AAA team, likely the Colorado Springs SkySox, also owned by ESG. Team would likely be a AAA affiliate of the Rangers, with Round Rock switching back to the Astros and Fresno going to the Brewers to replace the SkySox.
Ballpark sites discussed include the northwest corner of Hemisfair, at South Alamo and Market streets; the Institute of Texan Cultures; Fox Tech High School football fields; parking lot south of the Alamodome; and sites near Lone Star south of downtown, and the Pearl.
IMO, the sites on either side of I-37 maybe be the best spots in terms of visibility and the potential for a view of the Tower of the Americas in the outfield.
Plenty of red meat here both in the article and in the comments. I think the downtown roundabout idea is pretty intriguing, although the years of construction to make it a reality makes me shudder. Could suffocate downtown the way LRT construction suffocated those corridors.